22 



Mycologia 



and closely verrucose; aeciospores globoid, 21-26 by 23-29^; wall 

 pale or cinnamon-brown, 1.5-2^ thick, finely and closely verrucose. 



On Alibertia sp. (Rubiaceae), Piarco savanna, March 15, 3204; 

 Piarco savanna, south of Dabadie, March 21, 3286 (type) ; Meara 

 savanna, March 22, 3296. The species is remarkable for the large 

 pycnia, that are formed beneath the thin epidermis, but above the 

 thick palisade cells. They are morphologically similar to sub- 

 cuticular pycnia. 



68. Aecidium brasiliense Diet. Hedwigia 36: 35. 1897 

 On Cordia cylindrostachya R. & S., 3106, 324.6, 3251, 327J. 



69. Aecidium Byrsonimatis P. Henn. Hedwigia 34: 101. 1895 

 On Byrsonima verbascifolia Rich. ( ?), 3200. 



70. Aecidium delicatum sp. nov. 



0. Pycnia amphigenous, in small close groups, punctiform, 

 honey-yellow, noticeable, subepidermal, globoid, about 125 li in 

 diameter. 



1. Aecia hypophyllous, surrounding the pycnia, somewhat circi- 

 nating, on yellowish spots 1-2 mm. across, low and broad, 0.5-0.8 

 mm. in diameter ; peridium delicate, erect, finely erose ; peridial 

 cells oblong in surface view, rhomboidal in side view, slightly over- 

 lapping, 26-32 /jl long, the wall colorless, the inner wall 3-5 /x thick, 

 finely verrucose, the outer wall thinner, smooth ; aeciospores glo- 

 boid or ellipsoid, 16-24 by 20-30^; wall colorless, thin, 1 fx, 

 minutely and closely verrucose. 



On Encharis sp. (Amaryllidaceae) , Port of Spain, no date, col- 

 lected by Nowell and communicated by Seaver. Little compara- 

 tive study has been made of the rusts on Amaryllidaceous hosts. 

 Their identity is made especially difficult by the collection of single 

 stages and on hosts not fully determined. 



71. Aecidium Tournefortiae P. Henn. Hedwigia 34: 338. 



1895 



On Toumefortia tomentosa Mill., 32/8. 



